diff --git a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/application/service/storageSection/StorageSectionApplicationService.java b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/application/service/storageSection/StorageSectionApplicationService.java
index 0a17bb062..83cfb1af9 100644
--- a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/application/service/storageSection/StorageSectionApplicationService.java
+++ b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/application/service/storageSection/StorageSectionApplicationService.java
@@ -21,6 +21,7 @@ import com.mhd.system.service.ISysDictTypeService;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
+import java.math.BigDecimal;
 import java.util.List;
 /**
  * 库区ApplicationService
@@ -42,11 +43,32 @@ public class StorageSectionApplicationService {
      */
 
     public List<StorageSectionPO> queryList(StorageSectionDO storageSectionDO) {
+        //设置查询数据权限
+        applyQueryDataPermission(storageSectionDO);
+        return storageSectionDomainService.queryList(storageSectionDO);
+    }
+
+    /**
+     * 库区面积合计：与 /list 相同的数据权限和筛选条件，SQL 直接 SUM(库区面积)，
+     * 保证合计数与列表中各行库区面积之和一致
+     */
+    public BigDecimal sumStorageRegion(StorageSectionDO storageSectionDO) {
+        //与 /list 共用同一数据权限，保证合计与列表口径一致
+        applyQueryDataPermission(storageSectionDO);
+        return storageSectionDomainService.sumStorageRegion(storageSectionDO);
+    }
+
+    /**
+     * @description 设置查询数据权限（queryList 与 sumStorageRegion 共用）
+     * @author ZhouGY
+     * @param storageSectionDO
+     */
+    private void applyQueryDataPermission(StorageSectionDO storageSectionDO) {
         LoginUser loginUser = SecurityUtils.getLoginUser();
         if (loginUser != null && loginUser.getUserPo() != null) {
             Long userOrganizationId = loginUser.getUserPo().getOrganizationId();
             Long frontendOrganizationId = storageSectionDO.getOrganizationId(); // 前端传递的 organizationId
-            
+
             // 数据权限：根据 organizationId 来设置查询权限
             // 当前登录用户的 organizationId 为 2827 时，可查全部组织数据；其他组织只能查自己
             if (userOrganizationId != null && userOrganizationId == 2827L) {
@@ -91,7 +113,6 @@ public class StorageSectionApplicationService {
                 }
             }
         }
-        return storageSectionDomainService.queryList(storageSectionDO);
     }
 
 
diff --git a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/facade/IStorageSectionService.java b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/facade/IStorageSectionService.java
index 925dfb501..2d26a4299 100644
--- a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/facade/IStorageSectionService.java
+++ b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/facade/IStorageSectionService.java
@@ -5,6 +5,7 @@ import com.mhd.basic.domain.storageSection.entity.StorageSection;
 import com.mhd.basic.domain.storageSection.repository.po.StorageSectionPO;
 import com.mhd.basic.domain.storageSection.repository.todo.StorageSectionDO;
 
+import java.math.BigDecimal;
 import java.util.List;
 
 /**
@@ -20,6 +21,11 @@ public interface IStorageSectionService extends IService<StorageSection>
      */
     public List<StorageSectionPO> queryList(StorageSectionDO storageSectionDO);
 
+    /**
+     * 库区面积合计（与 queryList 相同筛选条件）
+     */
+    public BigDecimal sumStorageRegion(StorageSectionDO storageSectionDO);
+
     /**
      * 新增库区
      */
diff --git a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/mapper/StorageSectionMapper.java b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/mapper/StorageSectionMapper.java
index 46153810f..82196f40e 100644
--- a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/mapper/StorageSectionMapper.java
+++ b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/mapper/StorageSectionMapper.java
@@ -1,5 +1,6 @@
 package com.mhd.basic.domain.storageSection.repository.mapper;
 
+import java.math.BigDecimal;
 import java.util.List;
 import com.baomidou.mybatisplus.core.mapper.BaseMapper;
 import com.mhd.basic.domain.storageSection.entity.StorageSection;
@@ -19,4 +20,9 @@ public interface StorageSectionMapper extends BaseMapper<StorageSection>
      */
     public List<StorageSectionPO> queryList(StorageSectionDO storageSectionDO);
 
+    /**
+     * 库区面积合计（与 queryList 相同筛选条件）
+     */
+    public BigDecimal sumStorageRegion(StorageSectionDO storageSectionDO);
+
 }
diff --git a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/persistence/StorageSectionImpl.java b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/persistence/StorageSectionImpl.java
index 2f6e3fcfb..5f1f0baae 100644
--- a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/persistence/StorageSectionImpl.java
+++ b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/repository/persistence/StorageSectionImpl.java
@@ -10,6 +10,7 @@ import org.springframework.beans.BeanUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.math.BigDecimal;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -33,6 +34,15 @@ public class StorageSectionImpl extends ServiceImpl<StorageSectionMapper, Storag
         return storageSectionMapper.queryList(storageSectionDO);
     }
 
+    /**
+     * 库区面积合计（与 queryList 相同筛选条件）
+     */
+    @Override
+    public BigDecimal sumStorageRegion(StorageSectionDO storageSectionDO)
+    {
+        return storageSectionMapper.sumStorageRegion(storageSectionDO);
+    }
+
     /**
      * 新增库区
      */
diff --git a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/service/StorageSectionDomainService.java b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/service/StorageSectionDomainService.java
index 5fbe57933..c876f899f 100644
--- a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/service/StorageSectionDomainService.java
+++ b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/domain/storageSection/service/StorageSectionDomainService.java
@@ -21,6 +21,7 @@ import lombok.extern.slf4j.Slf4j;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
+import java.math.BigDecimal;
 import java.util.Arrays;
 import java.util.Date;
 import java.util.List;
@@ -53,6 +54,13 @@ public class StorageSectionDomainService {
         return storageSectionService.queryList(storageSectionDO);
     }
 
+    /**
+     * 库区面积合计（与 queryList 相同筛选条件）
+     */
+    public BigDecimal sumStorageRegion(StorageSectionDO storageSectionDO) {
+        return storageSectionService.sumStorageRegion(storageSectionDO);
+    }
+
 
     /**
      * 新增库区
diff --git a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/interfaces/facadeApi/storageSection/StorageSectionApi.java b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/interfaces/facadeApi/storageSection/StorageSectionApi.java
index 8125fdb67..3b7ff2366 100644
--- a/mhd-modules/mhd-system/src/main/java/com/mhd/basic/interfaces/facadeApi/storageSection/StorageSectionApi.java
+++ b/mhd-modules/mhd-system/src/main/java/com/mhd/basic/interfaces/facadeApi/storageSection/StorageSectionApi.java
@@ -55,6 +55,18 @@ public class StorageSectionApi extends BaseController{
         return getDataTable(list);
     }
 
+    /**
+     * 库区面积合计：与 /list 相同的筛选条件，返回库区面积总和
+     */
+    @ApiOperation("查询库区面积合计（与库区列表相同筛选条件，SUM(库区面积)）")
+    @GetMapping("/sumStorageRegion")
+    public AjaxResult sumStorageRegion(StorageSectionDTO storageSectionDTO)
+    {
+        //转换实体
+        StorageSectionDO storageSectionDO = storageSectionAssembler.toDO(storageSectionDTO);
+        return AjaxResult.success(storageSectionApplicationService.sumStorageRegion(storageSectionDO));
+    }
+
     /**
      * 分页查询库区列表
      */
diff --git a/mhd-modules/mhd-system/src/main/resources/mapper/basic/storageSection/StorageSectionMapper.xml b/mhd-modules/mhd-system/src/main/resources/mapper/basic/storageSection/StorageSectionMapper.xml
index d90903254..415037983 100644
--- a/mhd-modules/mhd-system/src/main/resources/mapper/basic/storageSection/StorageSectionMapper.xml
+++ b/mhd-modules/mhd-system/src/main/resources/mapper/basic/storageSection/StorageSectionMapper.xml
@@ -102,4 +102,12 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         <include refid="selectStorageSectionPo1"/>
         order by a.storage_name asc, a.create_time desc
     </select>
+
+    <!-- 库区面积合计：与 queryList 相同筛选条件，SUM(库区面积)，无数据时返回 0 -->
+    <select id="sumStorageRegion" parameterType="com.mhd.basic.domain.storageSection.repository.todo.StorageSectionDO" resultType="java.math.BigDecimal">
+        select IFNULL(SUM(a.storage_region), 0)
+        from storage_section a
+        LEFT JOIN warehouse w ON a.warehouse_id = w.warehouse_id AND w.del_flag = 1
+        <include refid="selectStorageSectionPo1"/>
+    </select>
 </mapper>
\ No newline at end of file